High Speed Photodetector, 500-890 nm Battery Biased GaAs Detector, 12.5 GHz

The 818-BB-45 High Speed GaAs Detector consists of a free-space 500 to 890 nm battery biased GaAs photodetector with a 60 µm active diameter and a <30 ps rise time. It includes a built-in bias supply consisting of one standard 3V lithium cells and a SMA connector output. The photodetectors have an internal 50 Ω termination. As the responsivity data is applicable to the diode only, the detector output should be determined based on 1/2 the responsivity of that shown on graph. It is a low-cost solution for ultra-fast measurements up to a 12.5 GHz bandwidth. These detectors are suitable for applications where detector rise time of <30 psec are required for Q-switched and Ultrafast Laser output analysis. The batteries are easily replaceable, and by disconnecting the detector from the oscilloscope input, when not in use, you can extend the lifetime of the batteries. It is equivalent to Coherent's Model ET-4000 (P/N 120-10071-0001).